Selection and application limits of gear oil pump

Selection strategy of gear oil pump

1、 Adhere to the principle of economy

The ultimate goal of chemical enterprises is to achieve high economic benefits, so in the process of selecting equipment, strict and sufficient consideration should be given to economic requirements, not only considering the cost of purchase, but also maintenance and repair costs. After comprehensive analysis of these factors, choose the best arc pump equipment to meet the needs of chemical production.

2、 Principles

The operational performance of gear oil pump equipment is a key indicator for continuous production, so this aspect should be considered in equipment selection. It is necessary to start from the perspectives of function, degree, and maintainability. The equipment function should meet the performance indicators before it can meet the system's temperature, pressure, and other performance requirements.

3、 Adhere to technical principles

In the process of selecting gear oil pump equipment, chemical units should ensure that its functions meet the requirements, and technical and economic aspects are key indicators. Only by comprehensively considering these basic principles can the actual needs be met, and the equipment's performance and characteristics should meet the requirements.

The key to the application of variable frequency speed regulation energy-saving technology lies in the use of variable frequency equipment to adjust the frequency of the motor stator power supply, achieve the regulation of the rotational speed, and cause significant changes in the ratio between voltage and frequency. At the same time, the energy-saving methods of variable frequency speed regulation often start from the perspective of valve adjustment, by applying variable frequency speed regulation equipment, opening all valves, and changing the motor power frequency to achieve changes in the motor operating speed. In terms of control mode selection, variable frequency speed regulation energy-saving technology mainly adopts single loop control and dual loop control. Among them, the single loop control method is mainly controlled by variable frequency speed regulation, which controls the signals output by the control system to increase the control of the conveying process of the variable frequency equipment and achieve the goal of correctly controlling the pump flow. The dual loop control method mainly focuses on the main control loop as the control object, and has a regulating control effect on the diversion process of the gear oil pump and the performance of the conveying process.

Gear oil pumps have a simple structure, easy processing, small size, light weight, and are characterized by self-priming and insensitivity to oil pollution, making them widely used. The main disadvantages of gear oil pumps in China are unbalanced radial hydraulic pressure and short bearing life; Large flow pulsation and high noise. In addition, its displacement is not adjustable and its range of use is limited. Gear oil pump is an essential component that uses a pair of involute gears with similar parameters and structures to roll and mesh with each other, raising the low-pressure oil in the oil tank to high-pressure oil that can do work. It is a power device that converts the mechanical energy of an engine into hydraulic energy. The gear oil pump has a large flow rate.

Gear oil pumps usually have valves to provide overload protection. But the valve cannot be used as a pressure reducing valve for a long time. When needed, it can be installed separately on the pipeline to transport smooth oil or other liquids that do not contain solid particles or fibers, are non corrosive, have a temperature not higher than 200 ℃, and a viscosity of 5-1500cst, and are essentially similar to smooth oil. It can also be used in hydraulic transmission systems.

Application limits of gear oil pump:

Used as a transmission and booster pump in the oil transportation system. A fuel pump used for transportation, pressurization, and radiation in the fuel system. A hydraulic pump used in hydraulic transmission systems to deliver hydraulic power. It can be used as a smooth oil pump in all industry boundaries. Gear oil pump concept: The gear oil pump should have oil leakage and return grooves inside, so that the torque force received by the gears during labor is small, resulting in low bearing load and minimal wear, and the pump.

Gear oil pump structure and labor characteristics:

The gear oil pump consists of components such as gears, shafts, pump bodies, pump covers, bearing sleeves, and shaft end seals. The gears and shafts have undergone strict heat treatment and have good hardness. They are installed together with the shaft in the shaft sleeve. All operating components inside the pump are smooth using the medium they transport. The hard tooth surface slag oil pump has four bearing sleeves installed inside the pump body, which automatically adjust the end face clearance according to the labor pressure. Therefore, the pressure of the pump is stable, the flow rate fluctuation is small, and the volume is small.

Correctly determining the working speed of the gear oil pump can avoid the meshing resonance frequency of the gear and shaft rotation, which can prevent the increase of noise. Because resonance is prone to occur when the meshing frequency approaches the natural frequency of the gear train. Adopting appropriate isolation techniques can prevent vibration from being transmitted to adjacent structures. For this purpose, the gear oil pump and the drive motor should be connected through a flexible coupling and installed on the same base plate with coaxiality. The base plate should be mounted on an elastic support to further enhance the vibration isolation effect. Installing an expansion chamber or accumulator on the inlet and outlet pipelines of the gear oil pump is a means of controlling the noise of high viscosity gear oil pumps by absorbing pressure pulsations of the pump or buffering sudden pressure changes in the pipeline.

The disassembly and maintenance items of the gear oil pump are as follows:

1、 Regularly adding grease, the electric oil drum pump is running, and the lubricating grease is easy to evaporate, so the lubrication at the bearing can be kept clean, and attention should be paid to replacement.

2、 Save each part and replace the same parts. When disassembling and inspecting the gear oil pump, each part should be well preserved. Special attention should be paid to the explosion-proof surface of the explosion-proof parts, including the insulation lining and sleeve, which should not be damaged. If there is damage, replace it with a new identical part. Do not use substitute materials with lower performance than the original material or parts that do not meet the original specifications. During assembly, all parts should be installed in their original positions without omission.

3、 Gear oil pumps should be regularly inspected and maintained, and electric oil drum pumps should be regularly inspected and maintained. The power cord should be checked for internal connections, plugs, switches, insulation resistance, loose brush tailstock, contact between commutator and brush, moderate open circuit in armature winding stage expansion stator winding, and damage to bearings and rotating parts.